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'Thinking About Mathematics', 'works' and 'Truth-making without Truth-makers'
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6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / b. Types of number
8763
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The number 3 is presumably identical as a natural, an integer, a rational, a real, and complex [Shapiro]
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6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / e. Ordinal numbers
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Von Neumann defined ordinals as the set of all smaller ordinals [Neumann, by Poundstone]
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6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / h. Reals from Cauchy
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Cauchy gave a formal definition of a converging sequence. [Shapiro]
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